A thickness range of 80-1500 microinches w/pad to pad planarity of 600 microinches seems to work well. Height across an individual pad should not matter unless the pad is very very large -- like maybe 0.250" on each side, Other Thoughts? Jim Herard IBM Microelectronics ---------------------- Forwarded by Jim Herard/Endicott/IBM on 05-22-97 07:15 PM --------------------------- linaks @ lw1.vsnl.net.in 05-22-97 02:38 PM Please respond to [log in to unmask] @ internet To: TechNet @ ipc.org @ internet cc: Subject: IPC A 600 E IPC A 600 E is silent on the acceptibility criteria for solder coating on SMD pads done by Vertical HASL machines. Since these rectangular SMD pads are placed along 'X' and 'Y' axis both on the same card perfect uniformity is never possible. IPC Technical talent pool should be able to throw some light on it. P. V. Khan Chief Quality Manager Linaks Microelectronics Limited *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************